>>1524517>>1524526The galley setup exists so a single conductor can casually walk through and click everyone's ticket without doubling back. The space loss was compensated by having more cars, which wasn't a problem because freight units were hauling them until the state took over. This was back when each train would have to be assembled and disassembled at each terminal, before cab cars were introduced by Caltrans in the 80s.
It's designed for commuters that have to commute ~25-50 miles every day. Nearby ACE, who does the same thing on the Altamont Pass, goes for 75 miles. This setup only makes sense in America where joe blow can buy a $350k fixer upper in southern Stockton but commute to his $250k/yr facebook or raytheon job every day.